<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
      div{
          width: 100px;height: 100px;
          border: 1px solid red;
      }
    div:hover{
     /* margin: 20px 0 0 20px;*/
      position: relative;
        top: 20px;
        left: 20px;
  </style>
</head>
<body>
<div>div1</div>
<div>div2</div>
<div>div3</div>


</body>
</html>